Improvement in stereotype-casts



M. J. HUGHES Stereotype Cast.

No. 212,937. Patented Mar. 4, I879.

WITNESSES INVENTOR ATTORNEYS.

NIPETERS, PHDTO-LITHOGRAPHER, wnsmNGTON, D c

FFIGE.

MARSHALL J. HUGHES, OF JERSEY CITY, NEW JERSEY.

lM PROVEMENT IN STEREOTYPE-CASTS.

@pecification forming part of Letters Patent No. 212,937, dated March 4,1879; application filed December 28, 1878.

To all whom it may concern:

Be it known that I, MARSHALL J. HUGHES,

of Jersey City, in the county of Hudson and State of New Jersey, haveinvented a new and useful Improvement in StereotypeOasts, of which thefollowing is a specification:

One method of making stereotype printing plates or blocks is to castthem solid. Another method is to cast them with longitudinal recesses inthe under side, such recesses being formed by means of iron cores, whichhave such cross-section as will enable them to be lifted out of, andthus easily separated from, the plate or block. A third method (which isillustrated in a patent heretofore granted to me) consists in castingthe plates around wooden blocks, which are thus embedded in the metal,so as to form a permanent attachment of the plates. The said woodenblocks, therefore, serve as cheap and light filling-pieces, talzin g theplace ofan equal bu o f metal.

My present invention consists in casting a printing-plate on woodencores, which serve as filling-pieces in subsequent use, yet which are soattached to or held in place on the plate, by reason of the relativeform or construction of both, that they may be readily separated fromthe plate, when occasion requires, by drawing them downward out of thegrooves or recesses in the same. In other words, I produce aprinting-plate which is so attached to a wooden block or blocks that thetwo may be separated, for the purposes hereinafter stated, but which yetform practically one device, capable of nsc,and of being handled andlocked in the form in the same manner as if the two components were ofmetal and cast solid together.

In the accompanying drawings, forming part of this specification, Figurel is a perspective view of my improved cast and its attached cores orfilling-pieces. Fig. 2 is a 1011- gitudinal vertical section of thesame.

A A indicate the wooden pieces which serve, first, as cores in thecasting process, and afterward as detachable filling-pieces in practicaluse of the plate in printing. B is the stereotypecast or printing-plate,having vertical parallel ribs 0 and D, between which thepieces Aare heldby frictional contact. The

cast B is formed in the usual way, the wooden pieces being placed in acasting-box and suitably supported over the face of the type from whichthe impression is to be taken, and the metal being then poured in. Theends of the cast and cores are then sawed off and the rough edges of themetal removed.

The pieces A, being rectangular, have parallel sides. The recesses orspaces between the outer supports, 0, and partitions D are necessarilyof corresponding shape. Thus the parts 0 D are parallel throughout theirlength, so that while the pieces A are in use held between them byfriction, they may be conveniently detached, which is effected bydrawing the same forcibly downward, as shown in Fig. 1.

In some instances the use of a wedge or pointed implement may benecessary to aid in removal of the cores.

To state the matter in other words, thecombined cores and filling-piecesare so held in the metal that they form practically an integral portionof the plate in actual use for printing purposes, yet the filling-piecesmay be detached when required for underlaying or rectifying the surfaceof the plate, or for other purpose.

I secure, by my improved construction, the advantages incident to. aplate cast solid with its support, and also those which are incident toa plate cast hollow or with recesses on its under side.

Having thus referred to prior inventions, and described my own, what Iclaim is The composite stereotype printing-block consisting of the twoparts, constructed and combined as hereinbefore described, to wit:first, the plate B, having the parallel and vertical outer andintermediate supports, 0 O D D; and, second, the removable wooden coresand filling-pieces A A, made rectangular in form, and fitted in therecesses between the supports, so that their under side shall be flushwith the lower edges of the supports, and, together with them, form theunder surface of the block, all as shown and described.

.MARSHALL J. HUGHES.

Witnesses:

O. SEDewIoK, J. H. SCARBOROUGH.

